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251-353-9-001 — CLAMP,BLOCK,SECTION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

251-353-9-001: CLAMP,BLOCK,SECTION.

The CLAMP,BLOCK,SECTION is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OR ALUMINUM ALLOY 356.0, block_height: 0.734 INCHES MINIMUM AND 0.734 INCHES MINIMUM AND 0.766 INCHES MAXIMUM0.766 INCHES MAXIMUM IN, overall_width: 0.609 INCHES MINIMUM AND 0.609 INCHES MINIMUM AND 0.641 INCHES MAXIMUM0.641 INCHES MAXIMUM IN, overall_length: 2.172 INCHES MINIMUM AND 2.172 INCHES MINIMUM AND 2.203 INCHES MAXIMUM2.203 INCHES MAXIMUM IN, style_designator: RECTANGULAR, mounting_facility: UNTHREADED HOLE(S)UNTHREADED HOLE(S). This part is cataloged in the U.S.

Government catalog under NSN 5340-01-337-6135, 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
251-353-9-001
NSN: 5340-01-337-6135
FSC: 5340 — Hardware, Commercial
CAGE: 15725 — RSI WIRELESS COMMUNICATIONS DBA CSA WIRELESS (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OR ALUMINUM ALLOY 356.0
block_height0.734 INCHES MINIMUM AND 0.734 INCHES MINIMUM AND 0.766 INCHES MAXIMUM0.766 INCHES MAXIMUM IN
overall_width0.609 INCHES MINIMUM AND 0.609 INCHES MINIMUM AND 0.641 INCHES MAXIMUM0.641 INCHES MAXIMUM IN
overall_length2.172 INCHES MINIMUM AND 2.172 INCHES MINIMUM AND 2.203 INCHES MAXIMUM2.203 INCHES MAXIMUM IN
style_designatorRECTANGULAR
mounting_facilityUNTHREADED HOLE(S)UNTHREADED HOLE(S)
surface_treatmentTIN
clamping_hole_diameter1.000 INCHES MINIMUM AND 1.200 INCHES MAXIMUM SINGLE HOLE IN
clamping_hole_quantity11
mounting_hole_diameter0.210 INCHES MINIMUM AND 0.210 INCHES MINIMUM AND 0.216 INCHES MAXIMUM0.216 INCHES MAXIMUM IN
mounting_hole_quantity22
distance_from_end_to_first_clamping_hole_center1.089 INCHES MINIMUM AND 1.099 INCHES MAXIMUM IN
NSN5340-01-337-6135
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 251-353-9-001 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 QUANTITY: 22
•
CLAMPING HOLE QUANTITY: 11
•
DISTANCE FROM END TO FIRST CLAMPING HOLE CENTER: 1.089 INCHES MINIMUM AND 1.099 INCHES MAXIMUM IN
•
BLOCK HEIGHT: 0.734 INCHES MINIMUM AND 0.734 INCHES MINIMUM AND 0.766 INCHES MAXIMUM0.766 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: RECTANGULAR
•
MOUNTING HOLE DIAMETER: 0.210 INCHES MINIMUM AND 0.210 INCHES MINIMUM AND 0.216 INCHES MAXIMUM0.216 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY22
CLAMPING HOLE QUANTITY11
DISTANCE FROM END TO FIRST CLAMPING HOLE CENTER1.089 INCHES MINIMUM AND 1.099 INCHES MAXIMUM IN
BLOCK HEIGHT0.734 INCHES MINIMUM AND 0.734 INCHES MINIMUM AND 0.766 INCHES MAXIMUM0.766 INCHES MAXIMUM IN
STYLE DESIGNATORRECTANGULAR
MOUNTING HOLE DIAMETER0.210 INCHES MINIMUM AND 0.210 INCHES MINIMUM AND 0.216 INCHES MAXIMUM0.216 INCHES MAXIMUM IN
OVERALL LENGTH2.172 INCHES MINIMUM AND 2.172 INCHES MINIMUM AND 2.203 INCHES MAXIMUM2.203 INCHES MAXIMUM IN
OVERALL WIDTH0.609 INCHES MINIMUM AND 0.609 INCHES MINIMUM AND 0.641 INCHES MAXIMUM0.641 INCHES MAXIMUM IN
CLAMPING HOLE DIAMETER1.000 INCHES MINIMUM AND 1.200 INCHES MAXIMUM SINGLE HOLE IN
DISTANCE FROM CENTER OF MOUNTING HOLE TO EDGE ALONG THE WIDTH0.297 INCHES MINIMUM AND 0.297 INCHES MINIMUM AND 0.328 INCHES MAXIMUM0.328 INCHES MAXIMUM 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
11441551-4Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 251-353-9-001?
251-353-9-001 is a CLAMP,BLOCK,SECTION.
What parts can replace 251-353-9-001?
There is 1 known substitute for 251-353-9-001: 11441551-4. Substitute compatibility should be verified for your specific system.
What is the NSN for 251-353-9-001?
251-353-9-001 is cataloged in the U.S. Government catalog under NSN 5340-01-337-6135. 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.