The B3000-50 is the 50 mL hybex bottle with standard GL32 blue cap — sold as 10-bottle pack at $133 ($13.31 per bottle). Important: this SKU uses the GL32 thread standard (a smaller cap thread than the GL45 used across the rest of the B3000 family) — designed for the smaller bottle neck typical of 50 mL bottle formats.
Critical thread-compatibility warning: The B3000-50 (GL32 cap) is NOT cap-interchangeable with the rest of the B3000 family (which uses GL45). The GL32 replacement cap is B3000-CAP2 ($41 / 10pk); the GL45 replacement cap B3000-CAP DOES NOT FIT the 50 mL bottle. Confirm cap-accessory thread compatibility at every replacement-cap procurement.
Key Specifications
| SKU | B3000-50 |
| Type | hybex small-volume bottle with GL32 blue cap |
| Volume | 50 mL |
| Cap thread | GL32 (smaller thread standard, NOT GL45) |
| Pack quantity | 10 bottles per pack |
| Per-bottle cost | $13.31 |
| Compatible replacement cap | B3000-CAP2 (GL32 standard blue cap, 10/pk, $41) |
| Incompatible cap | B3000-CAP DOES NOT FIT (B3000-CAP is GL45, this bottle is GL32) |
| Sister larger-volume SKUs | B3000-100-B, B3000-250-B, etc. — all GL45 (different cap thread, not interchangeable) |
| List price | $133 |
Why GL32 at the 50 mL Bottle Scale
The GL32 cap thread is the standard smaller-bottle thread for 50–100 mL bottle formats in the lab industry. Bottle necks at this volume scale are sized to GL32 to accommodate the smaller bottle geometry; GL45 caps would not fit the smaller neck. The hybex family follows this industry convention:
- 50 mL bottles: GL32 cap (this SKU)
- 100 mL and larger bottles: GL45 cap (the rest of the B3000 family)
For dual-cap-thread inventory facilities, both standards are common across the lab — facilities typically maintain replacement caps for both thread standards.
When to Pick the 50 mL Bottle
Pick the 50 mL bottle (B3000-50) when:
- Workflow uses small-aliquot 50 mL storage as the format (small reagent aliquots, sample-prep stocks, single-use reagent volumes)
- GL32-thread-accessory-compatible workflows — facility uses GL32-compatible accessories (smaller dispensing caps, smaller filtration accessories)
- Multi-thread-standard facility — facility maintains both GL32 and GL45 inventory for diverse storage volumes
Step up to GL45 100 mL pack (B3000-100-B) when GL45 cap-thread compatibility is the procurement standard and 100 mL is an acceptable working volume.
Ordering & Configuration
Confirm cap-thread accessory inventory. Critical: GL32 caps and GL45 caps are NOT cross-compatible. Confirm B3000-CAP2 (GL32 replacement cap) inventory at order — the standard B3000-CAP (GL45) does NOT fit this bottle.
Confirm autoclave compatibility. 50 mL bottles can typically autoclave with vented caps; confirm autoclave SOP at order.
Confirm at quote: bottle / cap material, GL32 cap-accessory pairing, autoclave compatibility, and lead time.
Warranty: Per Benchmark Scientific standard consumable terms.
hybex small-volume bottle (GL32 thread):
- B3000-50 (this product) — 50 mL × 10/pk ($133, $13.31/bottle) — GL32 thread
The 50 mL bottle uses GL32 (smaller thread); all other B3000 bottles use GL45. Pair with B3000-CAP2 GL32 replacement cap — NOT B3000-CAP (GL45). See B3000-1000-B anchor for the GL45 family chemistry; this 50 mL bottle is the family's smaller-thread outlier.
