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10512789 — RETAINER,HELICAL COMPRESSION SPR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

10512789: RETAINER,HELICAL COMPRESSION SPR.

RETAINER,HELICAL COMPRESSION SPR. Key specifications include material: COPPER ALLOY 268 OR COPPER ALLOY 360, lip_thickness: 0.043 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN, overall_height: 0.590 INCHES MINIMUM AND 0.595 INCHES MAXIMUM IN, end_hole_diameter: 0.260 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN, body_inside_diameter: 0.516 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN, fsc_application_data: MOUNT,TELESCOPE M128E2. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-470-7490, 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
10512789
NSN: 5340-00-470-7490
FSC: 5340 — Hardware, Commercial
CAGE: 19200 — COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE (USA)
SPECIFICATIONS
materialCOPPER ALLOY 268 OR COPPER ALLOY 360
lip_thickness0.043 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
overall_height0.590 INCHES MINIMUM AND 0.595 INCHES MAXIMUM IN
special_featuresEXTERNAL THREAD 0.938 IN.-32UN-2A,0.219 IN. THREAD LG. ON END HOLE END. COUNTERBORE 0.781 IN. DIA,0.255 IN. DEEP ON END OPPOSITE DRIVE END. DRILLED FACE DRIVE TYPE. A
end_hole_diameter0.260 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
body_inside_diameter0.516 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN
fsc_application_dataMOUNT,TELESCOPE M128E2
body_outside_diameter0.880 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
material_document_and_classificationQQ-B-626, COMP 1, 1/2 H MFR REF 1ST MATERIAL RESPONSE AND QQ-B-626, COMP 22, 1/2H FED SPEC 2ND MATERIAL RESPONSE
NSN5340-00-470-7490
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 10512789 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
•
FSC APPLICATION DATA: MOUNT,TELESCOPE M128E2
•
BODY OUTSIDE DIAMETER: 0.880 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-626, COMP 1, 1/2 H MFR REF 1ST MATERIAL RESPONSE AND QQ-B-626, COMP 22, 1/2H FED SPEC 2ND MATERIAL RESPONSE
•
BODY INSIDE DIAMETER: 0.516 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
LIP THICKNESS: 0.043 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.590 INCHES MINIMUM AND 0.595 INCHES MAXIMUM IN
FSC APPLICATION DATAMOUNT,TELESCOPE M128E2
BODY OUTSIDE DIAMETER0.880 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626, COMP 1, 1/2 H MFR REF 1ST MATERIAL RESPONSE AND QQ-B-626, COMP 22, 1/2H FED SPEC 2ND MATERIAL RESPONSE
BODY INSIDE DIAMETER0.516 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
LIP THICKNESS0.043 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
SPECIAL FEATURESEXTERNAL THREAD 0.938 IN.-32UN-2A,0.219 IN. THREAD LG. ON END HOLE END. COUNTERBORE 0.781 IN. DIA,0.255 IN. DEEP ON END OPPOSITE DRIVE END. DRILLED FACE DRIVE TYPE. A
MATERIALCOPPER ALLOY 268 OR COPPER ALLOY 360
END HOLE DIAMETER0.260 INCHES MINIMUM AND 0.270 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

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 10512789?
10512789 is a RETAINER,HELICAL COMPRESSION SPR.
What is the NSN for 10512789?
10512789 is cataloged in the U.S. Government catalog under NSN 5340-00-470-7490. 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.