PartsTable
Technical Data Sheet
Download PDF

3039T21 — STRAP,RETAINING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

3039T21: STRAP,RETAINING.

The STRAP,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL LOCATION NOT OTHERWISE SPECIFIED, overall_width: 1.250 INCHES NOMINAL IN, overall_length: 6.625 INCHES NOMINAL IN, style_designator: CURVED ARCH, surface_treatment: CHROMATE ZINC, material_thickness: 0.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-618-9130, 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
3039T21
NSN: 5340-01-618-9130
FSC: 5340 — Hardware, Commercial
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL LOCATION NOT OTHERWISE SPECIFIED
overall_width1.250 INCHES NOMINAL IN
overall_length6.625 INCHES NOMINAL IN
style_designatorCURVED ARCH
surface_treatmentCHROMATE ZINC
material_thickness0.250 INCHES NOMINAL IN
mounting_hole_size0.438 INCHES NOMINAL IN
distance_between_mounting_hole_centers5.250 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyTWO-HOLE CLAMP
NSN5340-01-618-9130
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3039T21 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 HOLE SIZE: 0.438 INCHES NOMINAL IN
•
DISTANCE BETWEEN MOUNTING HOLE CENTERS: 5.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CURVED ARCH
•
MATERIAL THICKNESS: 0.250 INCHES NOMINAL IN
•
SURFACE TREATMENT: CHROMATE ZINC
TECHNICAL CHARACTERISTICS
MOUNTING HOLE SIZE0.438 INCHES NOMINAL IN
DISTANCE BETWEEN MOUNTING HOLE CENTERS5.250 INCHES NOMINAL IN
STYLE DESIGNATORCURVED ARCH
OVERALL LENGTH6.625 INCHES NOMINAL IN
OVERALL WIDTH1.250 INCHES NOMINAL IN
MATERIAL THICKNESS0.250 INCHES NOMINAL IN
SURFACE TREATMENTCHROMATE ZINC
PART NAME ASSIGNED BY CONTROLLING AGENCYTWO-HOLE CLAMP
MATERIALSTEEL LOCATION NOT OTHERWISE SPECIFIED
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedNo demilitarization required
Ready to buy 3039T21?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 3039T21?
3039T21 is a STRAP,RETAINING.
What is the NSN for 3039T21?
3039T21 is cataloged in the U.S. Government catalog under NSN 5340-01-618-9130. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 3039T21

✓ 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.