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10638656 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

10638656: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, ring_style: EXTERNAL, usage_design: EXTERNAL, inside_diameter: 0.425 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN, major_thickness: 0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-046-5871, 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
10638656
NSN: 5325-01-046-5871
FSC: 5325 — Fastening Devices
CAGE: 56161 — GENERAL DYNAMICS LAND SYSTEMS CANADACORP (CAN)
SPECIFICATIONS
materialSTEEL
ring_styleEXTERNAL
usage_designEXTERNAL
inside_diameter0.425 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
major_thickness0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating67.5 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 72.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationFED STD 66 AISI 1066, 1069, 1070, 1072, 1074, 1075, 1078, 1080, 1084, 1086, OR 1090 FED STD SINGLE MATERIAL RESPONSE
NSN5325-01-046-5871
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 10638656 · 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: 67.5 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 72.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
•
USAGE DESIGN: EXTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66 AISI 1066, 1069, 1070, 1072, 1074, 1075, 1078, 1080, 1084, 1086, OR 1090 FED STD SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MAJOR THICKNESS: 0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 0.425 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: EXTERNAL
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING67.5 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 72.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
USAGE DESIGNEXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66 AISI 1066, 1069, 1070, 1072, 1074, 1075, 1078, 1080, 1084, 1086, OR 1090 FED STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MAJOR THICKNESS0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
INSIDE DIAMETER0.425 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEEXTERNAL
SURFACE TREATMENTCADMIUM AND CHROMATE
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 8
5325010465871Reference document
Same NSN cross-reference
Reference document — Informative reference only
R272NAA0047NN056NNPF1Reference document
Same NSN cross-reference
Reference document — Secondary reference
SL6-32X.375Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
MS3217-4047Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
5160-47Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
MLK-120Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 10638656?
10638656 is a RING,RETAINING.
What parts can replace 10638656?
There are 8 known substitutes for 10638656: 5325010465871, R272NAA0047NN056NNPF1, SL6-32X.375 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 10638656?
10638656 is cataloged in the U.S. Government catalog under NSN 5325-01-046-5871. 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.