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638031 — CLAMP,LOOP

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

638031: CLAMP,LOOP.

The CLAMP,LOOP is a the manufacturer industrial component. Key specifications include material: STEEL RETAINER, construction: TWO-PIECE, outside_diameter: 0.855 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE RETAINER, retainer_thickness: 0.047 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN, packing_inside_diameter: 0.236 INCHES MINIMUM AND 0.242 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-125-5189, 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
638031
NSN: 5330-00-125-5189
NIINs: 001255189, 003846142
FSC: 5330 — Packing and Gasket Materials
CAGE: 83259 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV COMPOSITE SEALING SYSTEMS DIVISION (USA)
SPECIFICATIONS
materialSTEEL RETAINER
constructionTWO-PIECE
outside_diameter0.855 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE RETAINER
retainer_thickness0.047 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
packing_inside_diameter0.236 INCHES MINIMUM AND 0.242 INCHES MAXIMUM IN
retainer_inside_diameter0.372 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-6855,GR 60 MIL SPEC SINGLE MATERIAL RESPONSE PACKING
packing_ring_cross-sectional_diameter0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
surface_treatment_document_and_classificationQQ-P-416 TY 2,CL 1 FED SPEC SINGLE TREATMENT RESPONSE RETAINER
NSN5330-00-125-5189
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 638031 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
•
RETAINER INSIDE DIAMETER: 0.372 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY 2,CL 1 FED SPEC SINGLE TREATMENT RESPONSE RETAINER
•
PACKING INSIDE DIAMETER: 0.236 INCHES MINIMUM AND 0.242 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.855 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
•
PACKING RING CROSS-SECTIONAL DIAMETER: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6855,GR 60 MIL SPEC SINGLE MATERIAL RESPONSE PACKING
•
RETAINER THICKNESS: 0.047 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM AND CHROMATE RETAINER
TECHNICAL CHARACTERISTICS
RETAINER INSIDE DIAMETER0.372 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY 2,CL 1 FED SPEC SINGLE TREATMENT RESPONSE RETAINER
PACKING INSIDE DIAMETER0.236 INCHES MINIMUM AND 0.242 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.855 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
PACKING RING CROSS-SECTIONAL DIAMETER0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6855,GR 60 MIL SPEC SINGLE MATERIAL RESPONSE PACKING
RETAINER THICKNESS0.047 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE RETAINER
MATERIALSTEEL RETAINER
CONSTRUCTIONTWO-PIECE
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 638031?
638031 is a CLAMP,LOOP.
What is the NSN for 638031?
638031 is cataloged in the U.S. Government catalog under NSN 5330-00-125-5189. 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.