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Technical Data Sheet

GSN/B9971 00550 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

GSN/B9971 00550: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include end_style: D SHAPE ABOVE INSIDE PERIPHERY, ring_style: STRAIGHT GAP, usage_design: INTERNAL, inside_diameter: 5.280 INCHES MINIMUM AND 5.370 INCHES MAXIMUM IN, outside_diameter: 5.700 INCHES MINIMUM AND 5.790 INCHES MAXIMUM IN, material_diameter: 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-446-9182, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
GSN/B9971 00550
NSN: 5325-01-446-9182
FSC: 5325 — Fastening Devices
CAGE: 64678 — DAIMLER TRUCK NORTH AMERICA LLC (USA)
SPECIFICATIONS
end_styleD SHAPE ABOVE INSIDE PERIPHERY
ring_styleSTRAIGHT GAP
usage_designINTERNAL
inside_diameter5.280 INCHES MINIMUM AND 5.370 INCHES MAXIMUM IN
outside_diameter5.700 INCHES MINIMUM AND 5.790 INCHES MAXIMUM IN
material_diameter0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating42.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleROUND
NSN5325-01-446-9182
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: GSN/B9971 00550 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL HARDNESS RATING: 42.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
•
USAGE DESIGN: INTERNAL
•
END STYLE: D SHAPE ABOVE INSIDE PERIPHERY
•
MATERIAL DIAMETER: 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66, COMP 1065 FED STD 1ST MATERIAL RESPONSE OR FED STD 66, COMP 1066 FED STD 2ND MATERIAL RESPONSE OR FED STD 66, COMP 1069 FED STD 3RD MATERIAL RESPONSE OR FED STD 66, COMP 1070 FED STD 4TH MATERIAL RESPONSE OR FED STD 66, COMP 1072 FED STD 5TH MATERIAL RESPONSE OR FED STD 66, COMP 1074 FED STD 6TH MATERIAL RESPONSE OR FED STD 66, COMP 1075 FED STD 7TH MATERIAL RESPONSE OR FED STD 66, COMP 1078 FED STD 8TH MATERIAL RESPONSE OR FED STD 66, COMP 1080 FED STD 9TH MATERIAL RESPONSE OR FED STD 66, COMP 1084 FED STD 10TH MATERIAL RESPONSE OR FED STD 66, COMP 1085 FED STD 11TH MATERIAL RESPONSE OR FED STD 66, COMP 1086 FED STD 12TH MATERIAL RESPONSE OR FED STD 66, COMP 1090 FED STD 13TH MATERIAL RESPONSE OR FED STD 66, COMP 1095 FED STD 14TH MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
OUTSIDE DIAMETER: 5.700 INCHES MINIMUM AND 5.790 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 5.280 INCHES MINIMUM AND 5.370 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING42.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
USAGE DESIGNINTERNAL
END STYLED SHAPE ABOVE INSIDE PERIPHERY
MATERIAL DIAMETER0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66, COMP 1065 FED STD 1ST MATERIAL RESPONSE OR FED STD 66, COMP 1066 FED STD 2ND MATERIAL RESPONSE OR FED STD 66, COMP 1069 FED STD 3RD MATERIAL RESPONSE OR FED STD 66, COMP 1070 FED STD 4TH MATERIAL RESPONSE OR FED STD 66, COMP 1072 FED STD 5TH MATERIAL RESPONSE OR FED STD 66, COMP 1074 FED STD 6TH MATERIAL RESPONSE OR FED STD 66, COMP 1075 FED STD 7TH MATERIAL RESPONSE OR FED STD 66, COMP 1078 FED STD 8TH MATERIAL RESPONSE OR FED STD 66, COMP 1080 FED STD 9TH MATERIAL RESPONSE OR FED STD 66, COMP 1084 FED STD 10TH MATERIAL RESPONSE OR FED STD 66, COMP 1085 FED STD 11TH MATERIAL RESPONSE OR FED STD 66, COMP 1086 FED STD 12TH MATERIAL RESPONSE OR FED STD 66, COMP 1090 FED STD 13TH MATERIAL RESPONSE OR FED STD 66, COMP 1095 FED STD 14TH MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLEROUND
OUTSIDE DIAMETER5.700 INCHES MINIMUM AND 5.790 INCHES MAXIMUM IN
INSIDE DIAMETER5.280 INCHES MINIMUM AND 5.370 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESTRAIGHT GAP
OTHER ITEMS IN FSC 5325 — Fastening Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317
SUBSTITUTES & CROSS-REFERENCES 1
B9971-00550Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GSN/B9971 00550?
GSN/B9971 00550 is a RING,RETAINING.
What parts can replace GSN/B9971 00550?
There is 1 known substitute for GSN/B9971 00550: B9971-00550. Substitute compatibility should be verified for your specific system.
What is the NSN for GSN/B9971 00550?
GSN/B9971 00550 is cataloged in the U.S. Government catalog under NSN 5325-01-446-9182. This indicates validated use in U.S. government and defense supply chains.
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