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177A265-28 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

177A265-28: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include ring_style: SPIRAL, usage_design: INTERNAL, inside_diameter: 7.935 INCHES MINIMUM AND 8.005 INCHES MAXIMUM IN, major_thickness: 0.127 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN, outside_diameter: 8.685 INCHES MINIMUM AND 8.755 INCHES MAXIMUM IN, casehardening_indicator: NOT CASEHARDENED. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-259-8170, 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
177A265-28
NSN: 5325-01-259-8170
FSC: 5325 — Fastening Devices
CAGE: 01289 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 1070 OR STEEL COMP 1572 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1085 OR STEEL COMP 1086 OR STEEL COMP 1090
ring_styleSPIRAL
usage_designINTERNAL
inside_diameter7.935 INCHES MINIMUM AND 8.005 INCHES MAXIMUM IN
major_thickness0.127 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN
outside_diameter8.685 INCHES MINIMUM AND 8.755 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleDOUBLE OVAL
NSN5325-01-259-8170
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 177A265-28 · 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
•
USAGE DESIGN: INTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE 1070 ASSN STD 1ST MATERIAL RESPONSE OR SAE 1072 ASSN STD 2ND MATERIAL RESPONSE OR SAE 1074 ASSN STD 3RD MATERIAL RESPONSE OR SAE 1075 ASSN STD 4TH MATERIAL RESPONSE OR SAE 1078 ASSN STD 5TH MATERIAL RESPONSE OR SAE 1080 ASSN STD 6TH MATERIAL RESPONSE OR SAE 1084 ASSN STD 7TH MATERIAL RESPONSE OR SAE 1085 ASSN STD 8TH MATERIAL RESPONSE OR SAE 1086 ASSN STD 9TH MATERIAL RESPONSE OR SAE 1090 ASSN STD 10TH MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: DOUBLE OVAL
•
OUTSIDE DIAMETER: 8.685 INCHES MINIMUM AND 8.755 INCHES MAXIMUM IN
•
MAJOR THICKNESS: 0.127 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 7.935 INCHES MINIMUM AND 8.005 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: SPIRAL
TECHNICAL CHARACTERISTICS
USAGE DESIGNINTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE 1070 ASSN STD 1ST MATERIAL RESPONSE OR SAE 1072 ASSN STD 2ND MATERIAL RESPONSE OR SAE 1074 ASSN STD 3RD MATERIAL RESPONSE OR SAE 1075 ASSN STD 4TH MATERIAL RESPONSE OR SAE 1078 ASSN STD 5TH MATERIAL RESPONSE OR SAE 1080 ASSN STD 6TH MATERIAL RESPONSE OR SAE 1084 ASSN STD 7TH MATERIAL RESPONSE OR SAE 1085 ASSN STD 8TH MATERIAL RESPONSE OR SAE 1086 ASSN STD 9TH MATERIAL RESPONSE OR SAE 1090 ASSN STD 10TH MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLEDOUBLE OVAL
OUTSIDE DIAMETER8.685 INCHES MINIMUM AND 8.755 INCHES MAXIMUM IN
MAJOR THICKNESS0.127 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN
INSIDE DIAMETER7.935 INCHES MINIMUM AND 8.005 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESPIRAL
MATERIALSTEEL COMP 1070 OR STEEL COMP 1572 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1085 OR STEEL COMP 1086 OR STEEL COMP 1090
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 2
3181139 PIECE 28Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
PRC-868Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 177A265-28?
177A265-28 is a RING,RETAINING.
What parts can replace 177A265-28?
There are 2 known substitutes for 177A265-28: 3181139 PIECE 28, PRC-868. Substitute compatibility should be verified for your specific system.
What is the NSN for 177A265-28?
177A265-28 is cataloged in the U.S. Government catalog under NSN 5325-01-259-8170. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.