Stanley 174055 Spare Part - O RING
Genuine DeWalt O‑Ring — part #174055. Precision sealing O‑ring (approx. 44.7 mm OD x 3.5 mm cross‑section) designed to restore airtight performance in DeWalt coil and connector nailers.
Built for the piston/head sealing chamber, this original DeWalt replacement ring prevents air leaks, preserves firing power and consistency, and is supplied as the direct-fit seal used on models such as DPN250MCN, DPN64C‑1/DPN64‑1 series, DPN75C and compatible DWMC150 / DW66C‑1 nailers.
Features:
- Part number: 174055 (DeWalt).
- Size: ~44.7 mm diameter x 3.5 mm thickness — exact fit for the piston head seal.
- Purpose: restores proper air seal and tool performance; recommended when pistoning action shows air loss or reduced power.
Quick, inexpensive maintenance part that gets your nailer back to factory sealing specs — install where the piston head/valve seals to prevent misfires and inconsistent driving depth.
Compatible models this part will fit:
- Stanley APC-2IN1 - Type REV A
- Bostitch SL1838BC-E - Type REV C
- Bostitch D31AD-E - Type REV 1
- Bostitch N66C-2-E - Type Rev 2
- DeWalt DPN64C - DPN64C Type 1
- DeWalt DPN75C - DPN75C Type 1
- Bostitch MCN150-E - Type Rev D / E
- DeWalt DPN250MCN - DPN250MCN Type 1
- DeWalt DW66C-1 - DW66C-1 Type 17300 000
- DeWalt DWMC150 - DWMC150 Type 1
