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9D6638 — STRAP,RETAINING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

9D6638: STRAP,RETAINING.

The STRAP,RETAINING is a the manufacturer industrial component. Key specifications include cushion: NOT INCLUDED, material: STEEL COMP 1085 LOCATION NOT OTHERWISE SPECIFIED, arch_radius: 0.120 INCHES NOMINAL IN, mounting_pad: NOT INCLUDED, overall_width: 5.969 INCHES MINIMUM AND 6.031 INCHES MAXIMUM IN, overall_length: 1.880 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-179-3121, 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
9D6638
NSN: 5340-01-179-3121
FSC: 5340 — Hardware, Commercial
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
cushionNOT INCLUDED
materialSTEEL COMP 1085 LOCATION NOT OTHERWISE SPECIFIED
arch_radius0.120 INCHES NOMINAL IN
mounting_padNOT INCLUDED
overall_width5.969 INCHES MINIMUM AND 6.031 INCHES MAXIMUM IN
overall_length1.880 INCHES NOMINAL IN
material_thickness0.359 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
inside_diameter/arch_length1.220 INCHES NOMINAL IN
material_document_and_classificationSAE 1085 ASSN STD SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED
NSN5340-01-179-3121
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 9D6638 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MOUNTING PAD: NOT INCLUDED
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE 1085 ASSN STD SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED
•
ARCH RADIUS: 0.120 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.359 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
•
CUSHION: NOT INCLUDED
•
MATERIAL: STEEL COMP 1085 LOCATION NOT OTHERWISE SPECIFIED
TECHNICAL CHARACTERISTICS
MOUNTING PADNOT INCLUDED
MATERIAL DOCUMENT AND CLASSIFICATIONSAE 1085 ASSN STD SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED
OVERALL LENGTH1.880 INCHES NOMINAL IN
OVERALL WIDTH5.969 INCHES MINIMUM AND 6.031 INCHES MAXIMUM IN
ARCH RADIUS0.120 INCHES NOMINAL IN
MATERIAL THICKNESS0.359 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
CUSHIONNOT INCLUDED
MATERIALSTEEL COMP 1085 LOCATION NOT OTHERWISE SPECIFIED
INSIDE DIAMETER/ARCH LENGTH1.220 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
5J8367Reference 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 9D6638?
9D6638 is a STRAP,RETAINING.
What parts can replace 9D6638?
There is 1 known substitute for 9D6638: 5J8367. Substitute compatibility should be verified for your specific system.
What is the NSN for 9D6638?
9D6638 is cataloged in the U.S. Government catalog under NSN 5340-01-179-3121. 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.