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70-539-1 — HOUSING,HOLDBACK ASSEMBLY

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

70-539-1: HOUSING,HOLDBACK ASSEMBLY.

The HOUSING,HOLDBACK ASSEMBLY is a the manufacturer industrial component. Key specifications include material: ASBESTOS OVERALL, head_style: CAVITY, oil_groove: INCLUDED, skirt_type: SOLID, carbon_groove: NOT INCLUDED, outside_diameter: 0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-137-2968, 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
70-539-1
NSN: 5330-00-137-2968
NIINs: 001372968, 011168565, 013041991, 015739802
FSC: 5330 — Packing and Gasket Materials
CAGE: 99167 — HAMILTON SUNDSTRAND CORPORATION (USA)
SPECIFICATIONS
materialASBESTOS OVERALL
head_styleCAVITY
oil_grooveINCLUDED
skirt_typeSOLID
carbon_grooveNOT INCLUDED
outside_diameter0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
pin_hole_bushingINCLUDED
style_designatorCIRCULAR
aperture_diameter0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN
ring_groove_quantity3
retaining_ring_grooveNOT INCLUDED
end_item_identificationAIRCRAFT; F18
NSN5330-00-137-2968
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 70-539-1 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
•
CROSS-SECTIONAL THICKNESS: 0.007 INCHES MINIMUM AND 0.009 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: A-56 FSCM 81977 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
APERTURE DIAMETER: 0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN
•
MATERIAL: ASBESTOS OVERALL
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.007 INCHES MINIMUM AND 0.009 INCHES MAXIMUM IN
STYLE DESIGNATORCIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATIONA-56 FSCM 81977 MFR REF SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
APERTURE DIAMETER0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN
MATERIALASBESTOS OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
747430Reference 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 70-539-1?
70-539-1 is a HOUSING,HOLDBACK ASSEMBLY.
What parts can replace 70-539-1?
There is 1 known substitute for 70-539-1: 747430. Substitute compatibility should be verified for your specific system.
What is the NSN for 70-539-1?
70-539-1 is cataloged in the U.S. Government catalog under NSN 5330-00-137-2968. This indicates validated use in U.S. government and defense supply chains.
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