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FEDERAL SPECIFICATION RR-C-271D, TYPE IVA
Major
Diameter
Threaded
Eye Max.
Diameter
Outside
Eye
Max.
Weight
per 100
shackles
(app.)
WILL
GRADE A
In Inches:
Min. Size
Min. Pin
Diameter
Maximum
Unthreaded
Width between Eyes
Norminal Tolerance (+ -)
Length inside
Nominal Tolerance
(+ -)
Width Bow
Mininum
3/16

1/4

5/16

3/8

7/16

1/2

9/16

5/8

3/4

7/8

1
1/4

5/16

3/8

7/16

1/2

5/8

5/8

3/4

7/8

1

1-1/8
5/16

13/32

15/32

17/32

19/32

23/32

23/32

27/32

31/32

1-3/32

1-7/32
3/8

15/32

17/32

21/32

23/32

13/16

7/8

1-1/16

1-1/4

1-7/16

1-11/16
1/16

1/16

1/16

1/16

1/16

1/16

1/16

1/16

1/16

1/16

1/16
7/8

1-1/8

1-1/4

1-7/16

1-11/16

1-7/8

2-1/8

2-13/32

3-27/32

3-5/16

3-3/4
1/16

1/16

1/16

1/8

1/8

1/8

1/8

1/8

1/4

1/4

1/4
9/16

3/4

13/16

15/16

1-1/16

1-3/16

1-5/8

1-1/2

1-3/4

2

2-5/16
9/32

11/32

13/32

15/32

17/32

21/32

21/32

25/32

29/32

1-1/32

1-5/32
5/8

7/8

1

1-1/8

1-1/4

1-3/8

1-5/8

1-7/8

2-1/8

2-3/8

2-5/8
5

12

18

30

49

74

92

144

216

337

530
650

1,000

1,500

2,000

3,000

4,000

5,000

6,500

9,500

13,000

17,000

































































































































































CHARTS

Stainless Steel Chart
Do you know your stainless steel?
GRADE
CORROSION RESISTANCE
STRENGTH
LIFE
SPAN
MAINTENANCE
302 SS
304 SS
316 SS
17-4 PH
poor
good
best
fair
best
best
good
excellent
fair
good
excellent
good
fair
fair
excellent
fair
General Descriptions:
Type 302 - A slightly higher carbon version of type 304, most commonly found in strip and wire forms. More corrosion resistant than 301 due to higher nickel content. Non-magnetic in annealed form, slightly magnetic when cold formed.

Type 304 - One of the most widely used and oldest of the stainless steels. This was originally called 18-8 which stood for its chromium and nickel content. It possesses an excellent combination of strength, corrosion resistance and fabricability.

Type 316 - This austenitic stainless steel has an added molybdenum content to increase its resistance to corrosion, when compared to other 300 series alloys. It will resist scaling at temperatures up to 1600 F. 316 is used in the marine industry for its resistance to corrosion.

Type 17-4PH - General purpose, precipitation-hardening stainless steel, Low temperature (1000 deg F approx) “age hardening” produces superior hardness/strength without distortion or scaling.











































The Effect of Temperature on the Working Load Limit of Chain
Temperature
Reduction of Working
Load Limit
Reduction of Working
Load Limit
Fahrenheit
Celsius
WHILE AT Temperature
AFTER EXPOSURE to Temperature
Below 400ºF

400º-800ºF

801º-1000ºF

1001º-1200ºF

1201º-1300ºF

1301º-1400ºF

1401º-1500ºF

1501º-1600ºF
Below 204ºC

204º-426ºC

427º-537ºC

538º-649ºC

650º-704ºC

705º-760ºC

761º-815ºC

816º-871ºC
None

0-10%

20%

30%

40%

50%

60%

75%
None

None

None

None

None

None

None

None

Basic Types of Chain Slings
Sling Types are designated throughout the industry by symbols.

First Symbol (Basic Type)
S
Single Chain Sling with master link and hook, or hook each end
C
Single Choker Chain Sling with master link each end. No hooks
D
 Double Chain Sling with standard master link and hooks.
T
 Triple Chain Sling with standard master link and hooks
Q
 Quadruple Chain Sling with standard master link and hooks

Second Symbol (Type of master link or end link)
O
 Standard Oblong Master Link- Recommended for all types

Third Symbol (Type of Hooks)
S
 Slip Hook
G
 Grab Hook
How to Order Chain Sling Components
1. Determine the maximum load to be lifted.
2. Choose the proper type of chain sling (single, double, etc.)
dictated by the size, shape and weight of the load.
3. Estimate the approximate angle between a leg of the sling
and the load during operation.
4. Select the proper attachments (hooks and master links)
for your chain sling.
5. Determine the overall reach from bearing point on master link
to bearing point on attachment.
6. Choose the chain size which meets your requirements.

Note: Angle to the load on multiple leg slings will be 60 degrees
or greater as long as the distance between lifting eyes of load
is not greater than reach shown on identification tag.






3 Easy Steps
1. Unscrew and verifycomponents.

2. Place cable through end fitting. Insert cable 1/4” to 3/8” through cone fitting. Place washer over cable and assemble.

3. Tighten lock screw. You’re done!
Why Would You Want to Use Mechanical Fittings?

Quick AttachTM” Fittings are precision machined from 316 stainless steel and Lloyds approved under #97/00200 for holding power of at least 90% of the maximum breakload of the wire rope used. Special attention has been placed on the strength of the terminals, which guarantees that the wire will always break

before the fitting even gets distorted.

The advantage of “Quick AttachTM” over conventional fittings is the arrangement of the wedges on the outside of the cable which makes assembly much easier and allows different types of wire to be used with the same fitting.

“Quick AttachTM” fittings are ideal for repair of rigging without swaging and for many other industrial, or architectural uses where the exact length of the cable cannot be determined beforehand or where assembly needs to take place on-site.


316-NMTM or NM-50TM

A Suncor exclusive, 316-NMTM is permanently embossed during the hot forging process into selected U.S. Federal Specification shackles, turnbuckles, eye nuts, eye bolts, swivels, master links, and wire rope clips. We use 316-NMTM to signify Type 316 superior stainlessTM, less than 1.1 mu (magnetic units) and in compliance with applicable Federal Specifications.

We use NM-50TM to signify Nitronic 50TM non-magnetic products that are made to stringent military specifications and used primarily by the U.S. Navy.